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What should I know about vitamin B12 before taking it?

You should not use this medication if you are allergic to cobalt or if you have Leber's disease. Vitamin B12 can lead to optic nerve damage (and possibly blindness) in people with Leber's disease. If you have any of these other conditions, you may need a dose adjustment or special tests to safely take vtiamin B12: any type of infection; iron or folic acid deficiency; kidney or liver disease; or if you are receiving any medication or treatment that affects bone marrow. Avoid drinking large amounts of alcohol while you are being treated with vitamin B12. Your dose needs may change if you become pregnant, if you breastfeed or if you eat a vegetarian diet. Tell your doctor about any changes in your diet or medical condition.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.